Unable to compile using jdk6

I am trying to compile a java class which uses sun.reflect.misc.FieldUtil on jdk6. The compilation fails on jdk6. However it was working fine on jdk5. The class is present in rt.jar but it is not being picked up. When I went through ct.sym, this package/class was not present. I removed ct.sym and compilation went through. This class is deprecated. Is that the reason of this class not being present in ct.sym? Is there any workaround for compiling my class without removing ct.sym.

[490 byte] By [Kshitiza] at [2007-11-27 0:27:14]